@article{ref1,
title="Earthquakes",
journal="American naturalist",
year="1868",
author="Brigham, W. t.",
volume="2",
number="10",
pages="539-547",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0003-0147",
doi="",
url="http://dx.doi.org/"
}